<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        .min{
            width: 100px;
            height: 100px;
            background-color: yellow;
        }
        .bg{
            background-color: red;
        }
        #list{
            /* display: none; */
            font-size: 40px;
            font-weight: bold;
        }
        .box{
            width: 100px;
            height: 100px;
            background-color: red;
        }
        .show{
            display: none;
        }
    </style>

</head>
<body>

    <div  id="test" data-test="123">11111111111111</div>

    <button>点击切换颜色</button>
    <div class="min"></div>

    <ul id="list" style="color: red;">
        <li>123</li>
        <li>123</li>
        <li>123</li>
        <li>123</li>
        
    </ul>


    <button id="show">显示/隐藏</button>
    <div class="box" style="border: 2px solid black;"></div>
    

    <script src="./index.js"></script>
</body>
</html>